S&P MidCap 400 constituent Lam Research Corp. (NASDAQ: LRCX) will replace Novellus Systems, Inc. (NASDAQ: NVLS) in the S&P 500 index and Royal Gold, Inc. (NASDAQ: RGLD) will replace Lam Research in the S&P MidCap 400 index after the close of trading on a date to be announced. Lam Research is acquiring Novellus in a deal expected to be completed soon pending final approvals.

Tempur-Pedic International Inc. (NYSE: TPX) will replace Thomas & Betts Corp. (NYSE: TNB) in the S&P MidCap 400 index after the close of trading on Tuesday, May 15. Thomas & Betts is being acquired by ABB Ltd. in a deal expected to be completed soon pending final approvals.

Globe Specialty Metals, Inc. (NASDAQ: GSM) will replace Delphi Financial Group, Inc. (NYSE: DFG) in the S&P Small 600 index after the close of trading on Tuesday, May 15. Tokio Marine Holdings Inc. is acquiring Delphi Financial in a deal expected to be completed on or about that date pending final approvals.